Here is the full list of all 24 Soda Dungeon achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Steal essence from an enemy.
Hope you're hungry.
Win a battle by only defending.
Complete 100 levels in one trip.
Purchase all basic sodas.
Complete dungeon level 250.
Have one Knight defend for another Knight.
Sell 100 items.
Complete dungeon level 100.
Find a rare item.
Slay 500 enemies.
Complete 50% of the bestiary.
Slay 10 bosses.
Enter a battle in the Arena.
Discover and explore an alternate path in the dungeon.
Complete your first dungeon trip.
Complete dungeon level 500.
Complete dungeon level 750.
Complete dungeon level 1000.
Find a legendary item.
Complete 100% of the bestiary.
Inflict burn, sleep, poison, and confusion on one enemy.
Reflect 100 damage from a single attack.
Complete 50 levels with only one Soda Junkie.